Power shovel



w. w. sLoANE POWER SHOVEL Original Filed 1390. 18

2 Sheets-Sheet 1 May 25,1926. 15863012 w. w. SLOANE POWER SHOVEL original Filed 1 2 Sheets-Sheet 2 .zgwdap D e p E 0 m MZZdlII W Patented May 25, 1926.

UNITED STATES PATIENT OFFIC E.

' "WILLIAM W. SLOANE, OF CHICAGO, ILLINOIS, *ASSIGNOR 'IO GOODMAN MANUFACTUR- ING COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

POWER SHOVEL.

Original application filed December 18, 1922, Serial No. 607,692. Divided and this application filed December 31, 1923, Seria1 No. 683,569.

This invention relates to power shovels or similar devices for handling loose material. The present application is a division of my application for improvements in power shovels, filed December 18, 1922, Serial Number 607 ,692, and relates particularly to a hydraulic jack adapted to engage overhead supporting means, such as part of a mine.

The principal object of this invention is to provide means whereby the fluid pressure for the hydraulic jack may also be exerted to partially support a rotatable member, such as a turntable, upon which the movable elements of the power shovel are carried.

The'invent-ion may best be understood by reference to the accompanying drawings showing one form in which it may be embodied.

In these drawings Figure 1 is a side elevation of a power shovel embodying the invention;

Figure 2 is a longitudinal section of the power shovel shown in Figure 1;

Figure 3 is a detail of the packing rings of the jack cylinder.

For purposes of illustration of my hydraulic jack I have shown this jack as applied to a power shovel, although it will be understood that so far'as the present invention is concerned it may also be applied to other forms of machines for handling materials.

Referring now to the details shown in the drawings:

The power shovel is mounted on a base frame 1 upon which the mechanism is car ried. This base may be of any form and may be mounted in any desired manner, principally so that it may be moved from place to place. In the form shown,,the base is detachably mounted on suitable truck wheels, so that it may be operated either on or off the tracks.

The jack is mounted centrally upon the base frame 1 and comprises a vertically disposed cylinder 3 containing a piston 4, arranged so that the piston may be raised by fluid pressure to engage a fixed part, such as the roof, and thereby forms a holding jack for the machine while it is in operation.

Renewed April 9, 1926.

"In the form illustrated most of the operating parts of the machine are mounted on a rotatable frame or turntable 5 which has bearing on the base 1 and moves axially about the vertically disposed cylinder 3, as best shown in Figure 2.

Means are provided for moving the turntable 5 around into any desired position together with the mechanism mounted thereon. In the construction herein shown this is accomplished mechanically as follows:

A motor 2 mounted. on the turntable 5 is connected by suitable intermediate gearing with a worm 17 which engages a worm gear 18 on a shaft 19. This latter shaft is operatively connected through beveled gears 20 and 21 with a beveled pinion 30 on a suitable bearing pin 33. The beveled pinion 30 engages a toothed portion 36 on the base frame 1. It will thus be seen that the turntable 5, together with the motor and other operating parts, may be rotated with respect to the central holding jack. Suitable reversing means may be provided if desired for reversing the direction of movement of the turntable. The shovei may thus be brought to any desired position circumferentially. The shovel operating mechanism is mounted upon and carried with the turntable. As shown herein this mechanism comprises a beam 8 which carries the shovel 9. This beam is preferably made up of two elements 8", 8, arranged on opposite sides of the centrally disposed holding jack. The beam 8 as herein shown is slidably mounted on a movable support or elevating arm 10, as clearly shown in Figure 2. This elevating arm is pivotally connected at 40 with suitable brackets 41, 41, carried by the turntable, the arrangement being such that said arm may be lifted and lowered to vary the position of the shovel.

Means for moving the elevating arm 10 pivotally aboutits axis so as to raise and lower the shovel consists of a cylinder 11 having a piston 12 therein pivotally connected with the elevating arm 10 adjacent its forward end, as indicated at 1%. The lower end of the piston 11 is pivotally mounted on the turntable by trunnions 13, 13, as shown in Figure 2.

A pair of bearing rollers 42, are provided at the forward end of the arm 10 to support each of the beam elements 8, 8 and rollers 18, as and 4d, 4L4; are provided at the rear end of said arm above and below said beam, so that the latter may be freely moved backward and forward in supporting. engagement with the elevating arm 10.

The hydraulic power connections for moving the beam longitudinally of the elevating arm and for raising and lowering said arm need not be described in detail as they form no part of the present invention. It will be understood however, that the hydraulic mechanism is preferably mounted upon the turntable and may be operated by hydraulic pressure means such as a pump 2 operatively connect-ed with the motor 2.

lleterring now to the central holding jack, details of which are shown in Figures 2 and 3, it will be seen that there are two packing rings and 81 at the top of the holding jack cylinder These rings are formed in a collar 82 carried on a ring 88 which is connected with the rotatable frame 5 and has bearing on the upper part of the fixed cylinder 3. The packing ring 80 is smaller than the packing ring 81, the former engaging the piston 4i and the latter engaging the upper end of the cylinder The pressure is introduced to the lifting cylinder through a pipe 85, connected to the collar 82 between the rings 80 and 81, and passes downwardly to the bottom of the cylinder 3 through grooves 86, 86, as shown in Figures 2 and 3. Owing to the difference in dimensions of the packing rings 80 and 81 it will be seen that there is a lifting effect provided when the fluid is under pressure proportionate to the difference in the areas of the two circles. The upward pressure of the fluid therefore supports a portion of the weight of the mechanism carried by the turntable 5, thus relieving considerable friction in the central bearing about which this turntable moves, and making the turning thereof much easier. The pressure may be manually controlled under certain conditions by valve 88, having manual control .handle 89.

Means are also provided for automatically limiting the vertical movements of the lifting jack which comprises a trip member 188 carried on a vertically disposed bracket 188 attached to the top of the piston l. The trip member 188 is arranged to engage a dog 189 mounted integrally with a handle 89 and arranged to automatically open the valve 88 thereby relieving the pressure in the cylinder 3 when the piston t has reached a predetermined height.

Although I have shown and described one form in which my invention may be embodied it will be understood that the arrangement and construction of the various parts may be altered without departing from the spirit and scope of the invention. Therefore I do not. wish to be understood as limitii myself to the specific construction illustrated excepting as it may be limited particularly in the appended claims.

I claim as my invention:

1. In a device of the character described, base having an upright cylinder mounted thereon, a plunger in said cylinder, a turntable having an axial bearing about said cylinder, and means whereby fluid pressure in said cylinder exerts upward pressure on said turntable.

2. In a device of the character described, a base having an uprightcylinder mounted thereon, a plunger in said cylinder, a turntable carried by said base for rotation about the axis of said cylinder, and means secured with said turntable and forming a seal between said plunger and cylinder and adapted for exerting upward pressure on said turntable from fluid pressure in said cylinder.

8. In a device of the character described, abase having an upright cylinder open at its upper end mounted thereon, a plunger extending downwardly into said cylinder, a turntable carried by said base for rotation about the axis of said cylinder, means on said turntable and forming a seal between said plunger and cylinder and adapted for exerting upward pressure on said turntable from fluid pressure in said cylinder, and fluid pressure means mounted on said turntable and having connection with said cylin der through said sealing means.

l. In a device of the character described, a base having an upright cylinder open at its upper end mounted thereon, a plunger extending downwardly into said cylinder, a turntable carried by said base for rotation about the axis of said cylinder, packing means between said turntable and plunger, other packing means between said turntable and cylinder, the joint of said second mentioned packing means having a greater diameter than the joint of said first mentioned packing means whereby to provide an area of the turntable upon which fluid pressure in said cylinder exerts an upward pressure, and fluid pressure means mounted on said turntable and having connection with said cylinder between said packing means.

5. In a device of the character described, a base, an upright cylindrical member mounted thereon, a second cylindrical member of reduced diameter extending axially above said first member, a turntable having axial bearing about said first member,

packing means carried by said turntable and engaging said first cylinder, and other packing means on said turntable spaced above the end of said first cylinder and engaging said second cylinder, and fluid pressure means mounted on said turntable and having connection with the upper end of the first cylinder intermediate the two packing means aforesaid.

6. In a device of the character described, a base having an upright cylinder mounted thereon, a plunger in said cylinder, a turntable having axial bearing about said cylinder, packing means carried by said turntable and engaging said cylinder, other packing means on said turntable spaced above the end of said cylinder and engaging said plunger, and fluid pressure means mounted 011 said turntable and having connection with the upper end of said cylinder intermediate the two packing means aforesaid.

7 In a device of the character described, a base having an upright cylinder mounted thereon, a plunger in said cylinder, a turntable having axial bearing about said cylinder, packing means carried by said turntable and engaging said cylinder, other packing means on said turntable spaced above the end of said cylinder and engaging said plunger, fluid pressure means mounted on said turntable and having connection with the upper end of said cylinder intermediate the two packing means aforesaid, and communicating means for said fluid pressure means extending from the upper end of said cylinder to the lower end thereof to actuate said plunger.

8. In a device of the character described, a base having an upright holding jack on said base adapted to engage a fixed support above the machine and comprising a cylinder and a vertically movable plunger, a turntable having axial bearing about said cylinder, a scoop mounted on said turntable having suitable actuating mechanism, packing means carried by said turntable and engaging said cylinder, other packing means on said turntable spaced above the end of said cylinder and engaging said plunger, fluid pressure means mounted on said turntable and having connection with the upper end of said cylinder intermediate the two packing means aforesaid, and communicating means for said fluid pressure means extending from the upper end of said cylinder I to the lower end thereof to actuate said plunger.

Signed at Chicago, in the county of Cook and State of Illinois, this 28th day of December, A. D. 1923.

WILLIAM WV. SLOANE. 

